My 2 cents. Your best option is to be patient with Octotel. If you want to help expedite your ticket over others then you will need to change ISP's to Atomic.
1. Octotel is a CTW (Cape Town and Cape Winelands) ONLY and therefore the best choice in their service area (if you are lucky enough to be able to afford to live or work in their service area - they don't expand it beyond their capability to cope. Atomic are likewise and they collaborate very well. Afrihost is a GP ISP and really only have clout over GP fibre providers. In SA everything has become regional or provincial including all infrastructure including communications and the providers theroff. Frogfoot started out as a Cape Town CBD provder and worked with CBT ISP's. Unfortunately they expanded beyond their capabilities, and you are now part of that evidence. So Octotel is your only choice if you want quality and quantity of service.
2. I was lucky enought to find out when Octotel were in our neighbourhood laying their infracstructure fiber and was able to convince the Strata board to contact them and ask them (while they were on our street) to run the connection into our building of 18 units - which they did (but later than they initially said). They also ran lines to the units (actually to each floor foyer ) to make the final connection less time consuming and their final connection crews more efficient. So when I ultimately signed up the final connection (basically only the installation of the ONT inside the unit) took only a few days wait and 5 minutes onsite. I would urge you to help your fellow tenents by asking Octotel when they come for your installation to do the same. You might even canvas the other owners to sign up with Atomic/Octotel when you do.
3. ONT's and fibre lines themselves are agnostic - they don't care who installs them or who connects to them. However no company wants to take over the liability of the other company - so Octotel will not use a ONT/fiber installed by Frogfoot and vice versa. After all who is to say that your problems with Frogfoot (and there long term complete inability to find your problem link in the chain) are not with your ONT or your local fiber (normally, but not always, a very relieable links in the chain).
4. Is the Afrihost server likely to be the cause? No they are very good. But somewhere in the connection between you an them (nowadays all fiber) there is a weak link. Shorten the chain and have less links - remember that the largest POP for SA to the World is at Melkbosstrand, soon perhaps to join Cape Town City - keep the chain short and try to stay at all times with greater Cape Town. Use people who are local and motivated to find and eliminate the weak link in the neighbourhoods where they (and you) live.